body {
    background-image: url("background.png");
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
}
footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    background-color: #f1f1f1;
    padding: 2px;
    font-size: 14px;
    color: #333;

}
h1 {
    font-size: 40px;
    color: #333;
    text-align: center;
    margin-top: 50px;
}

#tekst {
    font-size: 18px;
    text-align: center;
    margin: 20px;
    color: #555;
}

#knopka {
    margin: 20px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #ff6f61;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

img {
    display: none;
    margin: 40px auto;
}
input[type="button"] {
    margin: 5px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: green;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

input[type="button"]:hover {
    background-color: green;
}

#heart1, #heart2, #heart3 {
    margin-bottom: 30px;
}